code: def value(self, obs):
      out = torch.tanh(self.fc1(obs))
      out = torch.tanh(self.fc2(out))
      value = self.fc_value(out)
      return value
  
file_path: PARL/benchmark/torch/ppo/mujoco_model.py
imports: import parl
  import torch
  import torch.nn
  import numpy
label_desc: Use image node_id 2 for calling the MujocoModel obj's underlying member method code with example usage: obj.value(obs) and returns: value